What Marvel movie does Robert Downey Jr. think is the best of the bunch? Were the Russo Brothers worried about Captain America 3 showing down with Batman v Superman? Want to see the Gotham City jail from that film? How much did Action Comics #1 sell for on eBay? Where does Guardians of the Galaxy rank at the summer box office? Why is the Hulkbuster armor in Avengers: Age of Ultron? Read about all this and more in the return of Superhero Bits.